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                            <b>1.2.</b>
                        
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                            <b>1.2.1.</b>
                        
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                            <b>1.3.4.</b>
                        
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                            <b>1.4.</b>
                        
                        列表
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                            <b>1.4.1.</b>
                        
                        无序列表
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                        无序列表2
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                        有序列表
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                            <b>1.5.</b>
                        
                        实体字符
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                            <b>1.6.</b>
                        
                        iframe标签
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                            <b>1.7.</b>
                        
                        form表单
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                            <b>1.8.</b>
                        
                        拓展
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                        CSS
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                        元素选择器
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                        id和class选择器
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                        关系选择器
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                        属性选择器
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                            <b>2.6.</b>
                        
                        伪对象选择器
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                            <b>2.7.</b>
                        
                        字体
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                            <b>2.8.</b>
                        
                        元素颜色
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                            <b>2.9.</b>
                        
                        文本阴影
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        <li class="chapter " data-level="2.9.1" data-path="md/css/textdecoration.html">
            
                
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                            <b>2.9.1.</b>
                        
                        文本的线
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                            <b>2.10.</b>
                        
                        盒子
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                            <b>2.10.1.</b>
                        
                        行内元素和块级元素
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                            <b>2.10.2.</b>
                        
                        浮动
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                            <b>2.10.3.</b>
                        
                        弹性盒子
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                            <b>2.11.</b>
                        
                        定位
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                            <b>2.12.</b>
                        
                        练习
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                            <b>4.</b>
                        
                        Sass使用
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                            <b>5.</b>
                        
                        Gulp
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                            <b>6.1.</b>
                        
                        Date对象
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                            <b>6.2.</b>
                        
                        理解对象
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                        事件
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                        AJAX
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                        <h1 id="&#x5F39;&#x6027;&#x76D2;&#x5B50;">&#x5F39;&#x6027;&#x76D2;&#x5B50;</h1>
<p><strong>&#x5F97;&#xFF1A;&#x5F39;&#x6027;&#x76D2;&#x5B50;&#x662F; CSS3 &#x7684;&#x4E00;&#x79CD;&#x65B0;&#x7684;&#x5E03;&#x5C40;&#x6A21;&#x5F0F;&#x3002;CSS3 &#x5F39;&#x6027;&#x76D2;&#xFF08; Flexible Box &#x6216; flexbox&#xFF09;&#xFF0C;&#x662F;&#x4E00;&#x79CD;&#x5F53;&#x9875;&#x9762;&#x9700;&#x8981;&#x9002;&#x5E94;&#x4E0D;&#x540C;&#x7684;&#x5C4F;&#x5E55;&#x5927;&#x5C0F;&#x4EE5;&#x53CA;&#x8BBE;&#x5907;&#x7C7B;&#x578B;&#x65F6;&#x786E;&#x4FDD;&#x5143;&#x7D20;&#x62E5;&#x6709;&#x6070;&#x5F53;&#x7684;&#x884C;&#x4E3A;&#x7684;&#x5E03;&#x5C40;&#x65B9;&#x5F0F;&#x3002;&#x5F15;&#x5165;&#x5F39;&#x6027;&#x76D2;&#x5E03;&#x5C40;&#x6A21;&#x578B;&#x7684;&#x76EE;&#x7684;&#x662F;&#x63D0;&#x4F9B;&#x4E00;&#x79CD;&#x66F4;&#x52A0;&#x6709;&#x6548;&#x7684;&#x65B9;&#x5F0F;&#x6765;&#x5BF9;&#x4E00;&#x4E2A;&#x5BB9;&#x5668;&#x4E2D;&#x7684;&#x5B50;&#x5143;&#x7D20;&#x8FDB;&#x884C;&#x6392;&#x5217;&#x3001;&#x5BF9;&#x9F50;&#x548C;&#x5206;&#x914D;&#x7A7A;&#x767D;&#x7A7A;&#x95F4;&#x3002;&#x5F53;&#x5E03;&#x5C40;&#x7684;&#x65F6;&#x5019;&#xFF0C;&#x66F4;&#x591A;&#x7684;&#x4F1A;&#x5E94;&#x7528;&#x5728;&#x79FB;&#x52A8;&#x7AEF;&#x7684;&#x5E03;&#x5C40;</strong></p>
<p>&#x4F20;&#x7EDF;&#x5E03;&#x5C40;&#x65B9;&#x5F0F;</p>
<ol>
<li>&#x6D6E;&#x52A8;&#x5E03;&#x5C40;&#xFF08;FFC float formatting context&#xFF09;</li>
<li>&#x5757;&#x7EA7;&#x5E03;&#x5C40;(IFC inline-block formatting context)</li>
</ol>
<h3 id="css3&#x65B0;&#x65B9;&#x6848;">CSS3&#x65B0;&#x65B9;&#x6848;</h3>
<p>&#x5F39;&#x6027;&#x76D2;&#x5B50;(FFC flex formatting context)</p>
<p>&#x89C4;&#x5B9A;&#xFF1A;&#x7ED9;&#x7236;&#x5143;&#x7D20;&#x8BBE;&#x7F6E;display&#x4E3A;flex&#xFF0C;&#x5B50;&#x5143;&#x7D20;vertical-align,float,clear&#x90FD;&#x4F1A;&#x5931;&#x6548;</p>
<h4 id="&#x4E0B;&#x9762;&#x8FD9;&#x4E9B;&#x90FD;&#x662F;&#x53EF;&#x4EE5;&#x7ED9;&#x7236;&#x5143;&#x7D20;&#x8BBE;&#x7F6E;&#x7684;&#x5C5E;&#x6027;">&#x4E0B;&#x9762;&#x8FD9;&#x4E9B;&#x90FD;&#x662F;&#x53EF;&#x4EE5;&#x7ED9;&#x7236;&#x5143;&#x7D20;&#x8BBE;&#x7F6E;&#x7684;&#x5C5E;&#x6027;</h4>
<p><strong>&#x5C06;&#x5BB9;&#x5668;&#x8F6C;&#x6362;&#x4E3A;&#x5F39;&#x6027;&#x76D2;&#x5B50;</strong></p>
<p>&#x5757;&#x7EA7;&#x5F39;&#x6027;&#x76D2;&#x5B50;</p>
<pre><code class="lang-css">    <span class="hljs-rule"><span class="hljs-attribute">display</span>:<span class="hljs-value"> flex</span></span>;
</code></pre>
<p>&#x884C;&#x5185;&#x5F39;&#x6027;&#x76D2;&#x5B50;</p>
<pre><code class="lang-css">    <span class="hljs-rule"><span class="hljs-attribute">display</span>:<span class="hljs-value"> inline-flex</span></span>;
</code></pre>
<p>&#x9879;&#x76EE;&#x6392;&#x5217;&#x65B9;&#x5F0F;
 &#x9ED8;&#x8BA4;&#x503C;&#xFF1A;<code>row</code>(&#x5E38;&#x89C4;&#x6587;&#x6863;&#x6D41;&#xFF0C;&#x4ECE;&#x5DE6;&#x5F80;&#x53F3;&#xFF0C;&#x4E00;&#x884C;&#x6392;&#x5217;)<code>row-reverse</code>(&#x4ECE;&#x53F3;&#x5F80;&#x5DE6;&#x6392;&#x5217;)<code>column</code>(&#x7531;&#x4E0A;&#x5F80;&#x4E0B;&#x6392;&#x5217;&#xFF0C;&#x4E00;&#x5217;&#x6392;&#x5217;)<code>column-recerse</code>(&#x7531;&#x4E0B;&#x5F80;&#x4E0A;&#x6392;&#x5217;)</p>
<pre><code class="lang-css">    <span class="hljs-rule"><span class="hljs-attribute">flex-direction</span>:<span class="hljs-value"> row</span></span>;
</code></pre>
<p>&#x9879;&#x76EE;&#x662F;&#x5426;&#x6362;&#x884C;</p>
<p> &#x9ED8;&#x8BA4;&#x503C;&#x662F;&#xFF1A;<code>nowrap</code>(&#x4E0D;&#x6362;&#x884C;)<code>warp</code>(&#x6362;&#x884C;)</p>
<pre><code class="lang-css">    <span class="hljs-rule"><span class="hljs-attribute">flex-wrap</span>:<span class="hljs-value"> nowrap</span></span>;
</code></pre>
<p> &#x6392;&#x5217;&#x65B9;&#x5F0F;&#x548C;&#x662F;&#x5426;&#x6362;&#x884C;&#x7684;&#x7EFC;&#x5408;&#x5199;&#x6CD5;</p>
<pre><code class="lang-css">    <span class="hljs-rule"><span class="hljs-attribute">flex-flow</span>:<span class="hljs-value"> row nowrap</span></span>;
</code></pre>
<p>&#x9879;&#x76EE;&#x7684;&#x5BF9;&#x9F50;&#x65B9;&#x5F0F;</p>
<p><strong>&#x6C34;&#x5E73;&#x65B9;&#x5411;</strong></p>
<ol>
<li>&#x6C34;&#x5E73;&#x5C45;&#x4E2D;&#xFF1A;<code>center</code></li>
<li>&#x4E24;&#x7AEF;&#x5BF9;&#x9F50;&#xFF1A;<code>space-between</code></li>
<li>&#x5E73;&#x5747;&#x5206;:<code>space-around</code></li>
<li>&#x5DE6;&#x5BF9;&#x9F50;&#xFF1A;<code>flex-start</code></li>
<li>&#x53F3;&#x5BF9;&#x9F50;&#xFF1A;<code>flex-end</code><pre><code class="lang-css"> <span class="hljs-rule"><span class="hljs-attribute">justify-content</span>:<span class="hljs-value"> spac</span></span>;
</code></pre>
</li>
</ol>
<p><strong>&#x5782;&#x76F4;&#x65B9;&#x5411;</strong></p>
<pre><code class="lang-css">    <span class="hljs-rule"><span class="hljs-attribute">align-items</span>:<span class="hljs-value">flex-star</span></span>;
</code></pre>
<ol>
<li>&#x9876;&#x90E8;&#x5BF9;&#x9F50;&#xFF1A;flex-star</li>
<li>&#x5E95;&#x90E8;&#x5BF9;&#x9F50;&#xFF1A;flex-end</li>
<li>&#x5782;&#x76F4;&#x5C45;&#x4E2D;&#xFF1A;center</li>
<li>&#x586B;&#x6EE1;&#x8FD9;&#x4E2A;&#x5BB9;&#x5668;&#xFF1A;stretch</li>
<li>&#x5BB9;&#x5668;&#x57FA;&#x7EBF;&#x4E0A;&#xFF1A;baseline</li>
</ol>
<h4 id="&#x4E0B;&#x9762;&#x7684;&#x662F;&#x53EF;&#x4EE5;&#x7ED9;&#x5B50;&#x5143;&#x7D20;&#x8BBE;&#x7F6E;&#x7684;">&#x4E0B;&#x9762;&#x7684;&#x662F;&#x53EF;&#x4EE5;&#x7ED9;&#x5B50;&#x5143;&#x7D20;&#x8BBE;&#x7F6E;&#x7684;</h4>
<p><strong>&#x9879;&#x76EE;&#x7684;&#x6392;&#x5217;&#x987A;&#x5E8F;</strong></p>
<p><code>order</code>&#x9ED8;&#x8BA4;&#x503C;&#xFF1A;0
&#x652F;&#x6301;&#x6B63;&#x8D1F;&#x503C;&#x6574;&#x6570;</p>
<pre><code class="lang-css">    <span class="hljs-class">.bb</span> <span class="hljs-rule"><span class="hljs-attribute">p</span>:<span class="hljs-value">last-child{
        order: -<span class="hljs-number">1</span></span></span>;
    }
</code></pre>
<p><strong>&#x5355;&#x72EC;&#x63A7;&#x5236;</strong></p>
<ol>
<li>&#x9876;&#x90E8;&#x5BF9;&#x9F50;&#xFF1A;<code>flex-start</code></li>
<li>&#x5E95;&#x90E8;&#x5BF9;&#x9F50;&#xFF1A;<code>flex-end</code></li>
<li>&#x5782;&#x76F4;&#x5C45;&#x4E2D;&#xFF1A;<code>center</code></li>
<li>&#x586B;&#x6EE1;&#x8FD9;&#x4E2A;&#x5BB9;&#x5668;&#xFF1A;<code>stretch</code></li>
<li>&#x5BB9;&#x5668;&#x57FA;&#x7EBF;&#x4E0A;&#xFF1A;<code>baseline</code><pre><code class="lang-css"> <span class="hljs-rule"><span class="hljs-attribute">align-self</span>:<span class="hljs-value"> flex</span></span>;
</code></pre>
</li>
</ol>
<p><strong>&#x63A7;&#x5236;&#x591A;&#x4E2A;&#x8F74;&#x7684;&#x5C5E;&#x6027;</strong></p>
<pre><code class="lang-css">    <span class="hljs-rule"><span class="hljs-attribute">align-content</span>:<span class="hljs-value">center
</span></span></code></pre>
<ol>
<li>&#x9876;&#x90E8;&#x5BF9;&#x9F50;&#xFF1A;<code>flex-start</code></li>
<li>&#x5E95;&#x90E8;&#x5BF9;&#x9F50;&#xFF1A;<code>flex-end</code></li>
<li>&#x5782;&#x76F4;&#x5C45;&#x4E2D;&#xFF1A;<code>center</code></li>
<li>&#x586B;&#x6EE1;&#x8FD9;&#x4E2A;&#x5BB9;&#x5668;&#xFF1A;<code>stretch</code></li>
<li>&#x5BB9;&#x5668;&#x57FA;&#x7EBF;&#x4E0A;&#xFF1A;<code>baseline</code></li>
</ol>
<p><strong>&#x9879;&#x76EE;&#x7684;&#x4F38;&#x7F29;</strong></p>
<h5 id="&#x9879;&#x76EE;&#x653E;&#x5927;&#x5C5E;&#x6027;">&#x9879;&#x76EE;&#x653E;&#x5927;&#x5C5E;&#x6027;</h5>
<p><code>flex-grow:&#xFF08;&#x503C;&#xFF09;</code>&#x9ED8;&#x8BA4;&#x503C;&#x4E3A;0</p>
<h5 id="&#x9879;&#x76EE;&#x7F29;&#x5C0F;&#x5C5E;&#x6027;">&#x9879;&#x76EE;&#x7F29;&#x5C0F;&#x5C5E;&#x6027;</h5>
<p><code>flex-shrink:(&#x503C;)</code>&#x9ED8;&#x8BA4;&#x503C;&#x4E3A;1</p>
<pre><code class="lang-css">    <span class="hljs-class">.bb</span> <span class="hljs-rule"><span class="hljs-attribute">p</span>:<span class="hljs-value">first-of-type{
        flex-grow: <span class="hljs-number">1</span></span></span>;  <span class="hljs-comment">/*&#x653E;&#x5927;&#x7CFB;&#x6570;(1,1&#x500D;;2,2&#x500D;...)*/</span>
    }
</code></pre>
<h5 id="&#x5BB9;&#x5668;&#x5206;&#x914D;&#x7A7A;&#x95F4;&#x524D;&#xFF0C;&#x9879;&#x76EE;&#x5148;&#x5360;&#x7684;&#x7A7A;&#x95F4;">&#x5BB9;&#x5668;&#x5206;&#x914D;&#x7A7A;&#x95F4;&#x524D;&#xFF0C;&#x9879;&#x76EE;&#x5148;&#x5360;&#x7684;&#x7A7A;&#x95F4;</h5>
<p><code>flex-basis</code></p>
<pre><code class="lang-css">    <span class="hljs-class">.bb</span> <span class="hljs-rule"><span class="hljs-attribute">p</span>:<span class="hljs-value">first-child{
         flex-basis: <span class="hljs-number">200px</span></span></span>;   <span class="hljs-comment">/*&#x8BBE;&#x7F6E;&#x9879;&#x76EE;&#x7684;&#x7A7A;&#x95F4;*/</span>
    }
</code></pre>

                    
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